Question

Identify A, B and C of phloem :

• A. A = Sieve tube, B = Phloem parenchyma, C = companion cell
• B. A = phloem parenchyma, B = Companion cell, C = Sieve tube
• C. A = companion cell, B = Sieve tube, C = phloem parenchyma
• D. A = Companion cell, B = Phloem parenchyma, C = Sieve tube

Answer 1

The correct option is A A = Sieve tube, B = Phloem parenchyma, C = companion cell

A - Sieve tube elements are long tube like structures arranged longitudinally and are associated with the companion cells.

B - Phloem parenchyma is made up of elongated, tapering cylindrical cells, which have dense cytoplasm and nucleus.

C - The companion cells are specialized parenchymatous cells, which are closely associated with sieve tube elements. It helps in maintaining the pressure gradient in the sieve tubes.

So, the correct answer is "option A"